Where does the pythagorean identity sin2 θ + cos2 θ = 1 come from? how 
does it relate to right triangles?

How do you find the circumfrance of a circle?

Ialready asked this but i never got an answer. will give a high rating and perhaps brainliest. choose the linear inequality that describes the graph. the gray area represents the shaded region. y ≤ –4x – 2 y > –4x – 2 y ≥ –4x – 2 y < 4x – 2

Find the arc length of the semicircle. 7the grade